Develop Reference

CometD: Use SSL/TLS

How do I enable secure connections with CometD?
I have an app that is working when I use an "http" protocol for the BayeuxServer. If I switch to "https", I get failed handshakes.
What is the correct way to use a secure connection in CometD?
This is via the Java Client.
Here is the error:
{failure={exception=java.lang.NullPointerException, message={ext={ack=true}, supportedConnectionTypes=[long-polling], channel=/meta/handshake, id=4, version=1.0}, connectionType=long-polling}, channel=/meta/handshake, id=4, subscription=null, successful=false}
I do not see any exceptions on the server (ie, the null pointer is not in our code), and if I use HTTP, it works fine.
I've pieced together the following for the Java client side:
SslContextFactory sslContextFactory = new SslContextFactory();
sslContextFactory.setTrustAll(true); // only interacting with our backend, so accept self-signed certs
WebSocketClient webSocketClient = new WebSocketClient(sslContextFactory);
webSocketClient.start();
ClientTransport wsTransport = new JettyWebSocketTransport(null, null, webSocketClient);
HttpClient httpClient = new HttpClient(sslContextFactory);
httpClient.start();
ClientTransport httpTransport = new LongPollingTransport(null, httpClient);
I believe that will do it.
I still need to figure out how to configure the server side cometd to accept the secure connections. I am using the Spring setup.
The answer to the server side is: Its a pain in the ass.
Here is how you can get it working with the jetty maven plugin:
http://juplo.de/configure-https-for-jetty-maven-plugin-9-0-x/#comment-53352

How to select the interface in Jetty client

I want to send a http request via a virtual interface. I'm able to do it with Apache Http-Client :
HttpClient client = new DefaultHttpClient();
HttpParams params = client.getParams();
params.setParameter(ConnRoutePNames.LOCAL_ADDRESS, InetAddress.getByName("192.168.10.20"));
How can I do this in Jetty's Http-Client?

Docs for the Jetty client are here with plenty of examples:
http://www.eclipse.org/jetty/documentation/current/http-client-api.html

Solr - instantiate HttpSolrServer with Httpclient

I need to connect to our solr server which is behind a proxy(?).
Following I tried (nothing special):
SolrServer server = new HttpSolrServer("https://urltosolr/solr");
try {
SolrPingResponse pingResponse = server.ping();
} catch (SolrServerException e) {
....
}
stacktrace:
org.apache.solr.client.solrj.SolrServerException: IOException occured when talking to server at: https://urltosolr/solr
...
Caused by: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
After that I tried the other constructor for HttpSolrServer but I don't know how to set username and password correctly into HttpClient. Can anyone help?

I don't see where you're trying to connect through a proxy in your code, you only provided the solr url while creating the HttpSolrServer. You can provide your own HttpClient instance while creating your HttpSolrServer instance. Your HttpClient instance can contain the information about the proxy. The needed code should be the following, which you can find in the http-components examples:
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpHost proxy = new HttpHost(proxyHost, proxyPort, "http");
httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
httpclient.getCredentialsProvider().setCredentials(
AuthScope.ANY,
new UsernamePasswordCredentials(username, password));
SolrServer solrServer = new HttpSolrServer(solrUrl, httpclient);
Looking more at your question, I don't think you need to connect using a proxy. You error is about https. Have a look at this other question and answers to see what you need to do. The version of httpclient you need to look at is 4.x.

Can't authenticate with DefaultHttpClient

I want to add authentication header to my request. I'm using DefaultHttpClient from Apache httpclient 4.0.
I found that's done this way:
URI uri = new URI("http://www.bla.bla/folder/");
String host = uri.getHost();
int port = uri.getPort();
httpClient.getCredentialsProvider().setCredentials(
new AuthScope(host, port, AuthScope.ANY_SCHEME),
new UsernamePasswordCredentials("myuser", "mypassword")
);
This is executed and even with the debugger I see some credentials variable of the httpClient are set at the moment of doing the request. But I inspect web traffic with Charles and there's no authentication header.
Content of vars:
host: www.bla.bla
port: -1
Btw. I enabled Charles as a proxy to see the headers of the request, with:
HttpHost proxy = new HttpHost("127.0.0.1", 8888, "http");
httpParameters.setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
I think that should not be altering my headers, would make no sense for webproxy... anyways if I disable the proxy stuff it also doesn't work (although I can't see the content of the header but I suppose it's the same reason).
Also tried using a request interceptor like described in Softhinker.com's post here: How can I send HTTP Basic Authentication headers in Android?
And I get exactly the same request, without authentification header.
What am I doing wrong?
Thanks in advance.

I got it working setting the header "manually" in the request.
request.setHeader(new BasicHeader("Authorization", authstring));

Apache HTTP Client socks proxy

I am currently working at a web requests project and I am using Apache Http Client library. I try to connect to a server (E.g. http://www.google.com) with an working Socks v4/5 tested with mozilla firefox but the problem is that I never get a response. Only different errors...
Here is a code snippet:
//HttpClient
DefaultHttpClient http = new DefaultHttpClient();
//A class defined by me
Proxy proxy = bla bla;
HttpHost host = new HttpHost(proxy.getIP(), proxy.getPort());
if (proxy.getUsername() != null) {
http.getCredentialsProvider().setCredentials(
new AuthScope(proxy.getIP(), proxy.getPort()),
new UsernamePasswordCredentials(proxy.getUsername(), proxy.getPassword()));
}
http.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, host);
Can anyone tell a proper way to initiate comunnication through SOCKS proxies? Thanks!
Note: The code above works perfect with HTTP proxies.

Http proxy and socks proxy has very different protocols ( http://en.wikipedia.org/wiki/SOCKS#Comparison ).
For your question:
You can do thTis by native java socket ( How can I configure HTTPClient to authenticate against a SOCKS proxy? ) or create your own implementation over DefaultClientConnectionOperator, here is good guide ( http://4devops.blogspot.com/2011/10/httphttps-over-socks-proxy-with-java.html )